Electrode



J. H. PAYNE, JR.

ELECTRODE.

APPLICATION FLED APR 21.1921."

Patented 00 5. 17, 1922.

I EI-XlFll Fig.2.

Patented Oct. 17, 1922.

UNITED STATES PATENT OFFICE.

JOHN H. PAYNE, JR., OI SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELEC-TRIC COMPANY, A CORPORATION OF NEW YORK.

ELECTRODE.

Application filed April 21, 1821. Serial No. 463,226.

To all whom it may comewt:

Be it known that I, JOHN H. PAYNE, J r., a citizen of the United States,residing at Schenectady, in the county of Schenectady, State of NewYork, have invented certain new and useful Improvements in Electrodes,of which the following is a specification.

My present invention relates to electrodes, and more particularly togrid electrodes for electron discharge devices.

The object of my invention is to provide a structure for a gridelectrode made up of a large number of turns of wire of small diameterwhich will be self supporting, and which at the same time will be soarranged that adjacent turns of the wire will be maintained in desiredspaced relation to one another. A further object of my invention is toprovide such a structure in which there will be no necessity for weldedjoints be tween the different elements for maintaining them in theirroper spaced relation.

The novel features which I believe to be characteristic of my inventionare set forth in the appended claims, the invention itself, however,both as to its organization and method of operation will best beunderstood by reference to the following description taken in connectionwith the accompanying drawing in which Fig. 1 is an elevation of acomplete grid electrode; Fig. 2 is an enlarged perspective on one endthereof; Fig. 3 is a still further enlarged detail view of a smallportion; and Fig. llS a detail view of a modification.

As shown in the drawing, the electrode proper is made up of a helix of alarge number of turns of small wire. In order to maintain the desiredspacing between the turns of this helix, I provide a pluralityof smallerhelices 2, 3, 4 and 5, which are in contact with the larger helix and solocated with respect thereto that at least one turn of each of the smallhelices is interposed between every adjacent pair of turns of the largehelix. Through each of the smaller helices, a rod 6 extendslongitudinally so that each turn of the large helix where it passesthrough a small helix is ripped between the rod 6 and a turn 0? thesmall helix. By reason of this interlocking rela tion, the turns of thelarge helix are securely held in desired spaced relation to one another,without the necessity for any welded joints, and are also locked to thesmall hehces so that they cannot become disenga ed therefrom in any way.

11 the embodiment of my invention illustrated the helix 1 is supported uon supporting arms 7, 8, 9 and 10, whic are secured to a sleeve 11 bymeans of which the electrode may be mounted upon'the stem of a vacuumtube in the usual way. The helix 1 may be secured to these supportinarms by means of binding wires 12, as in icated. In the modificationshown in Fig. 4 two rods 13 and 14 extend longitudinally through each ofthe small helices and the turns of the large helix are held betweenthese two rods.

While I have shown separate supporting arms 7, 8, 9 and 10, the use ofthese separate arms is not essential as the small helices and the rods 6may be made of such size that the rods 6 will be adapted to form thenecessar supporting arms for the electrode.

hile I have shown and described the preferred embodiment of myinvention, it will be apparent that my invention is by no means limitedto the specific embodiment shown but that many modifications therein maybe made without departing from the scope of my invention as set forth inthe appended claims.

What I claim as new anddesire to secure by Letters Patent of the UnitedStates, IS I- 1. An electrode structure comprising a helix of largediameter, a plurality of helices of comparatively small diameterassociated with the large helix in such a way that at least one turn ofeach of the small helices is interposed between every adjacent pair ofturns of the large helix and a rod extending longitudinally through eachof the small helices for locking the turns of the large helix in spacedrelation to one another.

2. An electrode structure comprising a helix of large diameter, aplurality of helices of com aratively small diameter in contact with t elarge helix with at least one turn of each of the small helicesinterposed between every adjacent pair of turns of the large helix and arod extending longitudinally through each of the small helices in such away that each turn of the large helix is interposed between the rod anda turn of each of the small helices.

It. .\n electrode structure comprising a plurality of turns oi wire, awire helix associated therewith, in such a Way that at least one turn ofthe helix is interposed between ererv adjacent pair of turns of thewire. and "=1. rod extending longitudinally through the helix forlocking each of the turns of wire in spaced relation to one another.

4. An electrode structure for an electron discharge device emnprising aplurality of supporting arms, a helix of large diameter surrounding saidarms and supported thereby. a helix of comparatively small diameterassociated with the. large helix in such a way that at least one turn ofthe small helix is interposed between every adjacent pair of turns ofthe large helix, and a rod extending longitudinally through the smallhelix in such a way that each turn of the large helix is interposedbetween the rod and turn of the small helix.

5. A grid electrode for an electron discharge device comprising aplurality of rigid supporting arms, a helix of large diametersurrounding said arms, a plurality of helices of comparatively smalldiameter associated with the large helix in such a way that at least oneturn of each of the small helices is interposed between every adjacentpair of turns of the large helix, and a rod extending longitudinallythrough each of the small helices for locking the turns of the largehelix in spaced relation to one another.

6. An electrode structure comprising a helix of large diameter, a helixof comparatively small diameter in contact with the large helix and Withat least one turn thereof interposed between every adjacent pair ofturns of the large helix, and a rod extending longitudinally through thesmall helix in such a Way that each turn of the large helix isinterposed between the rod and a turn of the small helix.

In Witness whereof, I have hereunto set my hand this 20th day of April,1921.

JOHN H. PAYNE, JR.

